Execute AI-generated code in secure isolated E2B cloud sandboxes (SDK v2). Use for running Python/JavaScript/TypeScript/R/Java/Bash code, managing sandbox lifecycle (create, pause, resume, kill, list, connect), running coding agents (Claude Code, Codex, AMP, OpenCode) in sandboxes, git operations inside sandboxes, code contexts for parallel isolated execution, monitoring metrics (CPU, memory, disk), MCP gateway integration (200+ tools), uploading/downloading files, storage bucket mounting (S3, GCS, R2), streaming command output, SSH/PTY access, custom templates with Build System 2.0, and integrating LLMs with code execution capabilities.
Get second opinion from OpenAI (Codex), Google (Gemini), or Anthropic (Claude Code) models. Use when validating architectural decisions, reviewing code security, comparing implementation approaches, or when multi-model consensus adds value. Supports all three major AI CLI tools for maximum flexibility.
Debug-first browser automation with always-on visibility. Console logs, network requests, and errors captured by default. USE WHEN browser, screenshot, debug web, verify UI, troubleshoot frontend.
Build production applications with Claude Agent SDK (TypeScript and Python). Use when writing code that uses @anthropic-ai/claude-agent-sdk or claude-agent-sdk packages, creating agents with query(), ClaudeSDKClient, custom MCP tools, subagents, session management, permissions, hooks, plugins, structured outputs, or cost tracking. Also use for hosting/deploying SDK-based agents.
Build Streamlit-based Keboola Data Apps with Storage Files API integration. Use when creating data applications that run on Keboola platform, need to read/write files to Keboola Storage, require OIDC user authentication via proxy headers, or build multi-step wizards with session state. Triggers: "Keboola app", "data app", "Streamlit app for Keboola", "read from Keboola Storage", "save to Keboola Files".
Build trading bots and applications on Polymarket prediction markets. Use when working with Polymarket APIs, py-clob-client SDK, WebSocket streaming, order placement, market data fetching, whale tracking, or arbitrage detection. Triggers: Polymarket, prediction market, CLOB, trading bot, market making, py-clob-client, Magic.Link wallet, polygon trading.
Post-merge cleanup after a PR is merged on GitHub. Switches to main, pulls changes, deletes the merged branch, and watches CI/CD. Triggers: /post-merge, 'I merged the PR', 'PR is merged', 'cleanup after merge'.
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.